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The NIST reference dataset suite contains 27 datasets for validating
nonlinear least squares regression analysis software. NLREG has been
used to analyze all of these datasets with the following results: NLREG
was able to successfully solve 24 of the datasets, producing results that
agree with the validated results within 5 or 6 significant digits. Three
of the datasets (Gauss1, Gauss2 and Gauss3) did not converge, and NLREG
stopped with the message "Singular convergence. Mutually dependent parameters?"
The primary suggested starting values were used for all datasets except
for MGH17, Lanczos2 and BoxBOD which did not converge with the primary
suggested starting values but did converge with the secondary suggested
starting values.

In all cases where NLREG reported that it obtained
a solution, the answers were correct.

Results produced by NLREG when running each reference dataset can be
viewed below. Note in the analysis listings that the background information
about the dataset provided by NIST is listed first as an extended
comment enclosed between
'/*' and '*/' delimiters, the actual NLREG program (usually only a few lines)
follows, and the output generated by NLREG is the final portion of the listing.